Non-Magnetic Watch Co. Pocket Watch: Serial Number 58758 (Grade 71)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/non-magnetic-watch-co/58758/link

Access Date: April 30, 2025

Due to the lack of existing factory records, our Non-Magnetic Watch Co. database has been reconstructed using observations of known watches.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.

From the American Horology Archive:

Non-Magnetic Watch Co.

Grade: 71

Manufacturer:	Non-Magnetic Watch Co.
Manufacturer Location:	Geneva, Switzerland and USA
Movement Serial Number:	58758
Grade:	71
Model:	1
Estimated Production Year:	Members Only Data
Run Quantity:	Members Only Data
Grade/Model Run:	Members Only Data
Grade/Model Total Production:	Members Only Data
Variant Est. Production:	Members Only Data
Size:	16s
Jewels:	20j
Jewel Material:	Members Only Data
Jewel Setting:	Members Only Data
Movement Configuration:	Hunting
Movement Finish:	Nickel
Movement Inlay Color:	Members Only Data
Movement Setting:	Lever
Wind Mechanism:	Pendant
Plate:	3/4 Plate
Balance Type:	Expansion
Regulator:	Members Only Data
Hairspring:	Members Only Data
Standard Dial Type:	Members Only Data
Adjusted:	Members Only Data
Adjusted to Position:	Members Only Data
Adjusted # of Positions:	Members Only Data
Adjusted to Temperature:	Members Only Data
Adjusted to Isochronism:	Members Only Data
U.S. Patents:	Members Only Data
Movement Markings:	Members Only Data
Case:	Various
Run ID:	22.71G2.16S18.161M17.H14.L17.20J2
Database Version:	v52.642
Advanced Metrics
Members Only Data. Login or create a free account to unlock.
Registry Population: Scoped for This Run Only	2 (2.00%)
Research Note: #58747: Claimed as "Grade 100" classification without original adjustment certificate from Alexis Favre. Without the official certificate documenting this expert adjustment, this movement should be classified as Grade 71 by default.

18 Additional Member-Only Data Points Available

The following information is unlocked with a free account:

Estimated Production Year, Run Quantity, Grade/Model Run, Grade/Model Total Production, Variant Est. Production, Jewel Material, Jewel Setting, Movement Inlay Color, Regulator Type, Hairspring, Standard Dial Type, Adjustments, Adjusted to Position, Positional Adjustments, Temperature Adjustments, Isochronism Adjustments, U.S. Patents, Movement Markings

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
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